Recent questions tagged Java

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java - How to set custom ValidationEventHandler on JAXB unmarshaller when using annotations

We're using JAX-WS in combination with JAXB to receive and parse XML web service calls. It's all ... comment which is currently unanswered. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - Android Studio - 'Cannot resolve symbol' syntax highlighting errors although build is ok

I have a really annoying problem since several days, after I tried to restore a previously working Android ... build successfully. Screenshot: See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - Floating point literal, floating literal, double Literal

Is the 'floating point literal' and the 'floating literal' the same thing in Java? Also, is there anything called 'double literal' in Java? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - How to deserialize from a file to different class

I serialize a ArrayList<packageA.Changelog> list to a file and transmitted the file to another system in another ... for receiving the list? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - bazel - writable archivable path for test runtime

I'm running E2E test using some bazel test target (the scala flavour of java_test). In Maven I used ... deleted immediately after test finishes. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - How to pass a variable value from one JFrame to Another JFrame in Netbeans

I have two JFrames login.java and account.java I need to get the username from the login.java page and put ... Java NetBeans using the Swing? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - How to create a top-level servlet in liferay

I wanted to create a servlet in liferay that is listening to a URL such as http://localhost:8080/my-servlet I ... way to add such a servlet ? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - JavaFX video not playing

I followed some tutorials about combining JavaFX with Swing (JFrame) to play a video, however all I get is a black ... ); } return scene; } } See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - Public property VS Private property with getter?

This question has puzzled me for a while. A public property that can be accessed directly or a private property ... is better/correct and why? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - How to create zip target instead of jar in maven?

Can someone please help me in creating a zip target instead of jar in maven. I tried several ways but couldn't ... ----- [INFO] BUILD SUCCESS See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - JPA - EmbeddedId with @ManytoOne

I have a problem with my code (obviously) and after many searches on Internet, I don't find an answer to my ... don't know how to fiw it See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - ISO8601 with milliseconds in json using Jackson

import com.fasterxml.jackson.databind.util.ISO8601DateFormat; objectMapper.setDateFormat(new ISO8601DateFormat()); ... /ISO8601DateFormat.java See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - How to make Scanner Properly Read Escape Characters?

I'm reading from a file that reads something like all on one line: Hello World! I've been trying to get this to ... the String like it's \n. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - Executing headless eclipse in command line

Following this instruction, I could run headless Eclipse plugin in side Eclipse IDE. I've got some error log info, ... .Main.main(Main.java:34) See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - When wil the new Thread() without reference be garbage collected

In the below example, new Thread() doesnt have any reference. Is it possible that it be garbage collected below it is dead ... (); bb.go(); } } See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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552 views

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java - How do I use custom android.media.MediaDataSource along with android.media.MediaPlayer?

I know Android's MediaPlayer is a great thing. It allows us to play local files as well as media streams. And ... the raw data of the stream. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - How to untar a TAR file using Apache Commons

I'm using the Apache Commons 1.4.1 library to compress and uncompress ".tar.gz" files. I'm having trouble with the ... (); } tarIn.close(); } See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - Why use private lock over intrinsic lock?

While reading about synchronization, I came across "monitor pattern" to encapsulate mutable states. The following is ... of the intrinsic lock? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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675 views

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java - Jar file ADD DIRECTORY ENTRIES Eclipse option while exporting jar

I don't whether I am asking correct question or not but want to clear my doubt. Actually I came across the ... correct me if I am wrong. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - How does an entity get an ID before a transaction is committed in JPA/Play?

See this question. It turns out that even without committing the transaction manually, before the TX is committed, ... the TX is committed? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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596 views

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java - Accessing nested properties in JavaFx TableView / TableColumn

I havea TableView, and I access properties of the list's objects as follows. This works just fine. <TableColumn ... variations, but no luck. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - Mocking getClass method with PowerMockito

I'd like to avoid mocking the getClass() method for a class but cannot seem to find any way around it. I'm ... to fix this? Thanks in advance. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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595 views

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java - Is Spring HandlerInterceptorAdapter postHandle guaranteed?

I currently have two interceptors that handle a similar function. I'd like to merge these. One interceptor is ... as to these considerations? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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591 views

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java - Sum attribute of object with Stream API

I currently have the following situation: I have got a Report object which can contain multiple Query objects. The ... , please let me know! See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - Connecting to access database from linux

I've created my application and tested it under windows, which writes/reads to/from a access DB file. ... .getConnection(DriverManager.java:207) See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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637 views

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java - LocalTime from Date

I'm trying to convert a Date instance to a LocalTime instance. // Create the Date Date date = format.parse("2011- ... I'm using JDK version 1.8. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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676 views

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java - Swing and AWT Mixing is bad, but still done, why?

I have noticed that people recommend not intermixing Swing and AWT Components, however we see this alot: import javax. ... is said to be bad? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - Setting -XX:MaxRam

According to this link, there is an option to set MaxRamSize manually to restrict the JVM to not use memory beyond ... is the way forward :). See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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